<template>
  <div class="box">
    <div class="form_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- /头像区域 -->
      <!-- 登录表单区域 -->
      <el-form ref="elform" :model="form" :rules="rules" label-width="0" class="form" @keyup.enter.native="login()">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="form.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- /用户名 -->
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="form.password" prefix-icon="el-icon-lock" type="password"></el-input>
        </el-form-item>
        <!-- /密码 -->
        <!-- 按钮区域 -->
        <el-form-item class="btn_box">
          <el-button type="primary" @click="login()">登录</el-button>
          <el-button type="info" @click="reset()">重置</el-button>
        </el-form-item>
        <!-- /按钮区域 -->
      </el-form>
      <!-- /登录表单区域 -->
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      form: {
        username: '',
        password: ''
      },
      rules: {
        username: [
          { required: true, message: '必须填，呵呵哒', trigger: 'change' },
          { min: 3, max: 10, message: '3-10', trigger: 'change' }
        ],
        password: [
          { required: true, message: '必须填，呵呵哒', trigger: 'change' },
          { min: 6, max: 16, message: '6-16', trigger: 'change' }
        ]
      }
    }
  },
  methods: {
    reset() {
      this.$refs.elform.resetFields()
    },
    async login() {
      const valid = await this.$refs.elform.validate().catch(err => err)
      if (!valid) return
      const { data: res } = await this.$http.post('login', this.form)
      if (res.meta.status !== 200) {
        this.$message.error('登录失败')
        return
      }
      this.$message.success('登录成功')
      window.sessionStorage.setItem('login_token', res.data.token)
      this.$router.push('/home')
    }
  }
}
</script>

<style lang="less" scoped>
.box {
  background-color: #2b4b6b;
  height: 100%;
  .form_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }

    .form {
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 0 20px;
      box-sizing: border-box;
    }

    .btn_box {
      display: flex;
      justify-content: flex-end;
    }
  }
}
</style>
